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/* $Id: strrev.c,v 1.1 2007/03/01 13:10:55 dmix Exp $ */
#ifndef __AVR__
# include <stdio.h>
#endif
#include <stdlib.h>
#include <string.h>
#include "progmem.h"
#ifndef __AVR__ /* strrev() is't a standart function */
char * strrev (char *s)
{
char *p1, *p2;
for (p2 = s; *p2; ) p2++;
p1 = s;
while (p1 < p2) {
char c1 = *p1;
char c2 = *--p2;
*p1++ = c2;
*p2 = c1;
}
return s;
}
#endif
void Check (int line, const char *s, const char *expect)
{
char t[300];
char *p;
int code = 0;
int i;
for (i = 2; i; i--) {
if (strlen_P(s) > sizeof(t) - 1)
exit (1);
strcpy_P (t, s);
p = strrev (t);
if (p != t) {
code = line + 1000;
break;
}
if (strcmp_P (t, expect)) {
code = line;
break;
}
p = (char *)s; /* change strings */
s = expect;
expect = p;
}
if (!code)
return;
#if !defined(__AVR__)
printf ("\nLine %d: expect: \"%s\""
"\n result: \"%s\"\n",
line, expect, t);
if (code > 255) code = 255;
#elif defined(DEBUG)
exit ((int)t);
#endif
exit (code);
}
#define CHECK(s, expect) do { \
Check (__LINE__, PSTR(s), PSTR(expect)); \
} while (0)
int main ()
{
/* Empty string. */
CHECK ("", "");
/* 1 char long */
CHECK ("a", "a");
CHECK ("\001", "\001");
CHECK ("\377", "\377");
/* 2 chars long */
CHECK ("01", "10");
CHECK ("**", "**");
/* 3 and more chars long */
CHECK ("abc", "cba");
CHECK ("qwer", "rewq");
CHECK ("12345", "54321");
CHECK ("[];'./", "/.';][");
CHECK ("\001\177\200\201\377", "\377\201\200\177\001");
CHECK ("The quick brown fox jumps over the lazy dog.",
".god yzal eht revo spmuj xof nworb kciuq ehT");
/* Very long string. */
CHECK ("1..............................................................2"
"3..............................................................4"
"5..............................................................6"
"7..............................................................",
"..............................................................7"
"6..............................................................5"
"4..............................................................3"
"2..............................................................1");
CHECK ("1..............................................................2"
"3..............................................................4"
"5..............................................................6"
"7..............................................................8",
"8..............................................................7"
"6..............................................................5"
"4..............................................................3"
"2..............................................................1");
CHECK ("1..............................................................2"
"3..............................................................4"
"5..............................................................6"
"7..............................................................89",
"98..............................................................7"
"6..............................................................5"
"4..............................................................3"
"2..............................................................1");
return 0;
}
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